Messages "Certificate verification problem detected" and "Cannot guarantee authenticity of the domain to which encrypted connection is established" when trying to open a website

Latest update: January 24, 2023 ID: 12489

This article concerns: 

  • Kaspersky Anti-Virus 
  • Kaspersky Internet Security
  • Kaspersky Total Security
  • Kaspersky Security Cloud
  • Kaspersky Small Office Security


When opening a website, a warning message appears stating that "Certificate verification problem detected" or that "Authenticity of the domain to which encrypted connection is established cannot be guaranteed".


The website may not be safe. There is a possibility that intruders may steal your account data and other personal information. We do not recommend visiting such websites. 

For detailed information about what can cause the message to appear, see the section below.

If the warning appears not for websites but for applications installed on your computer, this means default encrypted connections scan settings have been changed. To fix the issue, restore the settings to default.


If you are sure that the website is safe (for example, if it's an official page of your bank) and do not want the application to check it in the future and show warnings:

  • Add the website that causes the warning to appear to the exception list. See instructions below.
  • Alternatively, disable the encrypted connections scanning. See instructions below.

We do not recommend disabling the encrypted connections scanning completely, as it will reduce you computer's protection level. 

If the website is not among those you visit regularly, you can allow opening it for the current session. Next time you will see the warning again. See the guide on how to allow opening the website once below.

If the notification appears on a website you don't use often, you can allow opening it once. See instructions below.  

If you are not sure if the website is safe, you can check it with OpenTip before proceeding.


Why does the warning message appear


How to allow opening the website this time


How to remove the certificate warning messages by disabling encrypted connections scanning


How to remove the certificate warning messages by adding the website to the exclusions list


How to update root certificates on Windows 7, 8, 8.1, 10


What to do if the message keeps reappearing

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